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Analog Devices Inc. LTC1198-2ACS8#TRPBF
- Part No.:
- LTC1198-2ACS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LTC1198-2ACS8#TRPBF.pdf
- Description:
- IC ADC 8BIT SAR 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,043
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Product details
Overview
LTC1198-2ACS8#TRPBF from Analog Devices (acquired Linear Technology) is an 8-bit, 750kHz sampling analog-to-digital converter with integrated 2-channel multiplexer and auto-shutdown mode. It operates from a single 2.7V–6V supply, consumes only 50mW at 5V or 10mW at 3V, and achieves ±1/2 LSB total unadjusted error over temperature. Its SO-8 package and 3-wire serial interface make it suitable for high-speed data acquisition in compact instrumentation and battery-operated systems.
For engineers reviewing the LTC1198-2ACS8#TRPBF datasheet, LTC1198-2ACS8#TRPBF pinout, LTC1198-2ACS8#TRPBF application, or LTC1198-2ACS8#TRPBF equivalent, key selection criteria include its 750kHz max sampling rate at 5V, 1nA shutdown current, differential or single-ended input configuration via software-selectable MUX, 8-bit resolution with no missing codes, and SO-8 thermal performance (θJA = 175°C/W).
Technical Context
The LTC1198-2ACS8#TRPBF implements a switched-capacitor successive approximation architecture with on-chip sample-and-hold, supporting full-accuracy input bandwidth up to 1MHz. Its 2-channel MUX allows software-selectable conversion of CH0, CH1, or their difference - configured via 4-bit DIN word including START, SGL/DIFF, ODD/SIGN, and dummy bits.
Auto-shutdown is triggered when CS is HIGH, reducing supply current to 1μA typical (0.001mA) at 5V and 0.001μA at 3.3V. The device uses VCC as both power supply and reference input (VCC/VREF), eliminating need for external reference while maintaining 1V–5V effective input span compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 8-bit with no missing codes - guarantees monotonic transfer function for reliable control loop feedback. |
| Max Sampling Rate | 750kHz at VCC = 5V - enables real-time capture of signals up to ~375kHz Nyquist bandwidth. |
| Total Unadjusted Error | ±1/2 LSB over temperature - ensures absolute accuracy without calibration in industrial-grade applications. |
| Supply Current (Active) | 11mA max at 5V - supports low-power embedded systems with tight thermal budgets. |
| Supply Current (Shutdown) | 1nA typical - extends battery life in intermittent-sampling applications like portable sensors. |
| Input Configuration | Software-selectable 2-channel MUX (CH0, CH1, or CH1–CH0) - eliminates external analog switching hardware. |
| Reference Architecture | VCC-as-VREF - simplifies BOM by removing external reference IC and associated decoupling. |
Pinout & Package
Package: 8-lead plastic SO (SO-8), 150°C max junction temperature, θJA = 175°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CS/SHUTDOWN (1) | Chip Select / Power Control | LOW enables conversion; HIGH forces auto-shutdown and disconnects internal power rails. |
| CH0 (2) | Analog Input Channel 0 | Single-ended input referenced to GND; used in SGL mode or as negative input in DIFF mode. |
| CH1 (3) | Analog Input Channel 1 | Single-ended input referenced to GND; used in SGL mode or as positive input in DIFF mode. |
| GND (4) | Analog Ground | Must connect directly to low-impedance analog ground plane to minimize noise coupling into SAR core. |
| DIN (5) | MUX Configuration Input | Serially loads 4-bit control word (START, SGL/DIFF, ODD/SIGN, dummy) to select input channel and mode. |
| DOUT (6) | Serial Data Output | MSB-first 8-bit conversion result; enters Hi-Z state within 70ns after CS goes HIGH. |
| CLK (7) | Serial Interface Clock | Accepts up to 12MHz clock (5V) or 4.6MHz (2.7V); defines tCONV = 710ns min at 5V. |
| VCC/VREF (8) | Power Supply & Reference | Supplies internal circuitry and sets full-scale range; bypassing to GND is mandatory for <1LSB noise performance. |
Key Features
| Feature | Design Value |
|---|---|
| Auto-shutdown mode | Reduces ICC to 1nA typical - enables microamp-level system sleep states without external power gating. |
| Integrated 2-channel MUX | Eliminates need for discrete analog switches or op-amp summing circuits in dual-sensor monitoring. |
| VCC-as-reference architecture | Removes external voltage reference IC, saving PCB area and cost while maintaining ratiometric accuracy. |
| 8-bit no-missing-codes performance | Ensures deterministic behavior in closed-loop control where code transitions must be monotonic. |
| SO-8 thermal design | θJA = 175°C/W enables operation at full speed in compact enclosures without forced air cooling. |
Applications
| High-Speed Disk Drive Monitoring | Portable Medical Sensor Hub |
|---|---|
Use Scenario: Real-time monitoring of spindle motor current and head position feedback in 2.5" HDDs. IC Role / Device Role / Timing Role: ADC digitizes analog servo signals at 750ksps to feed DSP-based position control loop. Use Value: 710ns conversion time and 1nA shutdown enable rapid sampling bursts synchronized to disk rotation, minimizing average power draw. | Use Scenario: Simultaneous acquisition of ECG lead I and II signals in handheld cardiac monitor. IC Role / Device Role / Timing Role: Configured in differential mode to reject common-mode noise between leads. Use Value: Software-selectable MUX allows dynamic reconfiguration between lead pairs without hardware changes, supporting multi-lead diagnostics. |
| Battery-Powered Oscilloscope Probe | Industrial PLC Analog Input Module |
Use Scenario: Digitizing 0–5V sensor outputs in handheld scope with 1Msps equivalent sampling via interleaving. IC Role / Device Role / Timing Role: Provides 8-bit resolution at 750ksps with minimal external components. Use Value: Single-supply 2.7–6V operation and 10mW power at 3V extend battery runtime beyond 8 hours in continuous capture mode. | Use Scenario: Converting 4–20mA transducer outputs in modular I/O rack with cold-junction compensation. IC Role / Device Role / Timing Role: Interfaces to microcontroller via 3-wire SPI-compatible bus with no level-shifting required. Use Value: VCC-as-VREF architecture ensures ratiometric accuracy against supply variations in noisy factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 8-bit SAR ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADS7822U | 2.7–5.25V supply; 1MSPS; no auto-shutdown; requires external reference. | Lacks integrated MUX and shutdown - needs external switch and ref IC for same functionality. | Choose when higher sampling rate is critical and board space allows added components. |
| MAX1113ECUA+ | 2.7–3.6V only; 100ksps; SPI interface; 1.5μA shutdown current. | Lower speed and narrower supply range - unsuitable for 5V or >200ksps applications. | Prefer for ultra-low-voltage battery systems where 100ksps suffices and 5V operation is not needed. |
Compared with ADS7822U and MAX1113ECUA+, the LTC1198-2ACS8#TRPBF uniquely integrates MUX, auto-shutdown, and VCC-as-VREF in SO-8 - reducing component count by ≥3 devices while enabling 750ksps operation across 2.7–6V supplies.
Availability
LTC1198-2ACS8#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition, portable instrumentation, and battery-operated systems requiring stable component supply and long-term lifecycle support.
Supply support for LTC1198-2ACS8#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LTC1198-2ACS8#TRPBF belongs to ADI's legacy Linear Technology precision data acquisition product line, designed specifically for compact, low-power, high-speed sampling applications where integration, supply flexibility, and guaranteed monotonicity are critical.
FAQ
What is the maximum sampling rate of the LTC1198-2ACS8#TRPBF at 5V supply?
The LTC1198-2ACS8#TRPBF achieves a maximum sampling rate of 750kHz when operated at VCC = 5V, as specified in the AC Characteristics table under fSMPL(MAX) for LTC1198-2A grade. This corresponds to a minimum conversion time of 710ns and requires a clock frequency up to 12.0MHz.
Does the LTC1198-2ACS8#TRPBF require an external voltage reference?
No, the LTC1198-2ACS8#TRPBF does not require an external voltage reference. Pin 8 (VCC/VREF) serves as both power supply and reference input, enabling ratiometric operation. Full-scale range equals VCC, supporting input spans from 1V to 5V depending on supply voltage.
How does the auto-shutdown feature work on the LTC1198-2ACS8#TRPBF?
The LTC1198-2ACS8#TRPBF enters auto-shutdown when CS/SHUTDOWN (Pin 1) is driven HIGH. In this state, internal power rails disconnect and supply current drops to 1nA typical. Conversion resumes within microseconds upon CS going LOW, with no reset sequence required.
What input configurations does the LTC1198-2ACS8#TRPBF support via its MUX?
The LTC1198-2ACS8#TRPBF supports three input configurations via its software-selectable 2-channel MUX: single-ended CH0, single-ended CH1, or differential (CH1 – CH0). Configuration is set by the 2-bit SGL/DIFF field in the 4-bit DIN control word during each conversion cycle.
Is the LTC1198-2ACS8#TRPBF pin-compatible with other members of the LTC1196/LTC1198 family?
Yes, the LTC1198-2ACS8#TRPBF shares identical SO-8 pinout and electrical interface with all LTC1196/LTC1198 variants, including LTC1198-1ACS8#TRPBF and LTC1196-2ACS8#TRPBF. Differences lie in grade (A/B), speed bin (1/2), and functional type (LTC1196 vs LTC1198), not physical layout or pin function mapping.
LTC1198-2ACS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Number of Bits:
- 8
- Sampling Rate (Per Second):
- 750k
- Number of Inputs:
- 1, 2
- Input Type:
- Differential, Single Ended
- Data Interface:
- SPI
- Configuration:
- S/H-ADC
- Ratio - S/H:ADC:
- 1:1
- Number of A/D Converters:
- 1
- Architecture:
- SAR
- Reference Type:
- External
- Voltage - Supply, Analog:
- 2.7V ~ 6V
- Voltage - Supply, Digital:
- 2.7V ~ 6V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 8-SO
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
LTC1198-2ACS8#TRPBF FAQ
1.How can I place an order for LTC1198-2ACS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LTC1198-2ACS8#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LTC1198-2ACS8#TRPBF reliable?
The price and inventory of LTC1198-2ACS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LTC1198-2ACS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LTC1198-2ACS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LTC1198-2ACS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LTC1198-2ACS8#TRPBF?
LTC1198-2ACS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LTC1198-2ACS8#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LTC1198-2ACS8#TRPBF?
For technical support, including LTC1198-2ACS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LTC1198-2ACS8#TRPBF requirements.
6.How does Aetrix verify that LTC1198-2ACS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LTC1198-2ACS8#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LTC1198-2ACS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LTC1198-2ACS8#TRPBF?
All LTC1198-2ACS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LTC1198-2ACS8#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LTC1198-2ACS8#TRPBF part is unused and in its original packaging.
Return procedure for LTC1198-2ACS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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